ciancia 4 times and found a note how he wanted to instill fear on the traitorous mind and he talked to cnn. >> my mission is accomplished if i just kill one. >> pall is our son and brother. we will continue to love him and care for him. >>reporter: detectives have combed through pall ciancia southern california apartment and other former residence trying to determine what set him off he was describe as loaner but former roommate says he was a nice guy. >> going back to jersey work for his dad and make amends with family problems. >>reporter: now attorney general holder believes federal officials may have to rethink security measures at airport nationwide. >> responsibility for protecting airport security is not a tsa function. but something that i think we need to certainly examine given what happened in los angeles. >>reporter: investigators found 5 full magazine of ammunition at the crime scene. alleged gunman now unresponsive at nearby hospital. if he does regain conscienceness he could face the death penalty. this is abc news los angeles. >> despite computer problems president obama ha